Type-writing machine



(No Model.) v 2 Sheets-Sheet 1.

J. R, ROBINSGN. TYPE WRITING MACHINE.

No. 447,357. Patented Mar'. 8, 1891.

A I A w In" @smul 'l III (No Mom.) 2 sheets-sheet 2.

J. R. ROBINSON. TYPE WRITING MACHINE. y

No. 447,357. Patemedmaf. 3,1891'.

IH IIH @wurm/to@ embodying my improvements.

'UNITED- VSTATES PATENT OFFICE.

JOI-IN R. ROBINSON, OF SALEM, ASSIGNORJTO LYMAN S. I-IAPGOOD, OF BOSTON, MASSACHUSETTS.

TYPE-.,wRlTlNe MACHINE.

SPECIFICATION forming part of Letters Patent No. 447,357, dated March 3, 1891. Applicationled May 6, 1889. Serial No. 309,748. (No modelf) T0 all whom it' may concern,.-

Be it known that I, JOHN R. ROBINSON, of Salem, in the .county of `Essex and State of Massachusetts, have invented a new and useful Improvement in Type-Vriting Machines; and I do hereby declare that the following is a full, clear, and exact description of the same.

My present invention is an-iinprovement upon the type-writing machine which is the subject of United States Patent No. 414,588, granted to me on the 5th day of November, 1889, and relates especially tothe details of construction, by reason of which the machine is materially simplified in construction and made more efficient in operation. These details of construction will be hereinafter particularly described, and specifically pointed out in the claims.

In the accompanying drawings, Figure 1- represents a side elevation of a type-writer Fig. 2 is a plan view of the same. Fig. 8 is a detached view of the driving mechanism for the papercarriage. Fig. 4: is a detail view of'the irnprovements relating lto the feed-'rollers of the paper-carriage. Fig. 5 is a detail view of the feed-rolls. Fig. Gis a detail sectional view of the printing-frame slightly raised and the support therefor.

The present machine, as in my former application, embodies the general principle of the Hall type-writing machine, with the exception, in the present case, that the printing mechanism is stationary, while the paper-carriage has the intermittent movement. The printing mechanism is not different from that shown in the Hall patent, No. 238,387, dated March 1, 1881, and the particular arrangement of the printing-frame, consisting of the platev carrying the inking-pad and the upper plate carrying the printing-forni, held together by means of links at front and rear, is substantially the same in construction and operation as in my former application referred to. In

that application, however, the printing-frame was pivoted at its rear end to rigid supportingarms extending rearwardly from the front of the machine, and this made it difficult to insert the paper into the paper-carriage, and 1 have sought to overcome this objection by providing a pivotal connection with the projecting lugs a of the base A of the machine for the front ends of the arms A, to which the printing-frame is pivoted. Studs B B extend from the inner faces of the lugs a a and serve to support the arms A when in normal position. The printing-frame tits closely between the arms A, and also finds a support for the forward end on each side upon the projecting ends of the studs B B, which project within the line of the inner faces of the arms A. Studs c c are secured to the under face of the arms A, and have extending flanges, which serve to support the front end of the printingframe on each side, so that the said frame may be lifted with the arms A. The pivoted arms allow the whole printing-frame, together with the arms, to be swung to the front, this movement being limited by a stop d, and then the whole length of the-paper-carriage is exposed and a sheet may be easily inserted.

Asthe parts of the printing-frame are permanently connected, as in the present case', by means of the links 1, I connect the plate Which carries the inking-pad (marked 2) by meanspof a hinged joint at the rear to the side bars 3 of the inking-frame, and also provide spring-catches 4t on the front end of the side bars, which catch over yflanges 5, and thus hold the plate securely in place normally, but allowing it to be readily detached Whenever desired.

Instead of the complex system of levers shown in my former application, I have materially modified the means for giving intermittent movementto the paper carriage. This carriage is substantially of the form shown in my former application, and consists 4of a bottom plate e, upon the front edge of which is carried the rack-bar f, Withl teeth at top and bottom. A T-shaped extension :t is formed on the'bottom of the plate e, and

the head of the T engages a correspondinglyshaped slot in the base-plate, so that the carriage is thus preventedfrom being displaced. Suitable bearing-rollers are arranged on each side of the base-plate e, and these run on raised surfaces, which form tracks for the easy running of the carriage. A projecting stop g, Fig. 1, extending from the rear of the carriage, comes' in contact with a stud h, Figs. 1

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and 2, projecting from the base-plate, and this limits the movement of the carriage to the right. The rack-bar is given intermittent movement by means of a lever C, which is pivoted to a projection on the base-plate, and is provided with an angular extension G, which carries a pivoted pawl 7, connected by means of a pin to an arm extending from the extension (5. Then this pin connects the pawl with the arm, the carriage is fed along in the movement of the lever C one step at a time; but when this pin is removed the complete depression of the lever will feed the carriage forward a distance equal to two single movements. rlhe end of the lever C extends beneath the stud B at one side, through which a slot is made, and an anti-friction roller is connected to the end of the lever at this point. A spring 7 keeps the lever constantly pressed against the stud. An operating-slide 8 rests upon the anti-friction roller of the lever C, and by depressing this slide the lever is operated to feed forward the carriage.

In order to prevent movement of the carriage to the left when the feeding operation is not taking place, I provide a link C', pivoted at one end to a projection on the base-plate and at the other end to the lever C, and this link has a projection 9 extending beneath the rack-bar, having a tooth which engages with the teeth of the rack when the operating-lever C is in its normal position, and thus while the upper pawl prevents movement ot' the carriage in one direction the projection with its tooth prevents movement in the opposite direction.

In order to operate the slide 8 and through it the lever C automatically by the depression of the upper plate of the printing-frame, I provide a pivoted linger-piece lO, pivoted to one of the side bars of the printing-frame and having` an extension 11 directly above the turned-over end of the slide 8. A stop 12 on the top plate of the printing-frame limits the upward movement of the finger-piece, and thus as the stop-piece is depressed the stop depresses with it the linger-piece and in this way operates the lever C through the slide 8. This gives the necessary space during the printing, and in order to secure a space between words itis only necessary to depress the finger-piece, and thus the slide 8 is operated without requiring the depression of the printing-frame.

The feed-rollers for the paper are shown at k Z', the former being the larger of the two and having bearings in the end wall of the carriage. This roller is operated by means of a milled thumb-screw connected to an extension of the shaft of the roller at one end. A metal casing m protects the rear face of the roller and partially overlaps its upper surface. The smaller roller has its bearings in the end walls of a pivoted clip n, the journals of the roller passing through slots in the end walls of the carriage and through loops o, which have spindles projecting to the rear through the casing m, and between nuts on the end of these spindles and the casing springs are interposed, which thus place the smaller roller under tension and normally in close contact with the larger roller. rlhe paper-clip n is pivoted on the end of the journals of the small rollers, and is adapted to swing to the front to uncover the bite of lthe rollers, and in this movement by reason of curved slots in the end walls engaging with pins in the end walls of 'the paper-carriage an eccentric action is given to the pivots of the small roller and it is forced away from the large roller, so as to make an opening between the two, and when the clip is thrown forward to cover the rolls the springs react, and through the loops described draw the small roller closely in contact with the large ones.

1. In combination, the supporting-base, the paper-carriage thereon, a printing-frame, and means for supportingsaid printing-frame, consisting of two parallel laterally-extending arms pivotally connected at their front ends to the base, supporting-bearings for the said arms to sustain them rigidly, the said printing-frame being p-ivoted to the rear free ends of the two supporting-arms opposite their point ot support, and the plate Z, comprising a part of the printing-frame and movable vertically under tension, substantially as described.

2. In combination, the supportingbase, the paper-carriage thereon, the lugs d on the base, the printing-frame, and means for supporting the said frame, consisting of the two arms A A, pivoted at their front ends to the lugs and extending laterally over the paper-carriage, the said printing-frame being movable vertically between the arms and independently thereof, and the bearings for supporting the arms and limiting their movement, said bearings being on the lugs to which the arms are pivoted, substantially as described.

3. In combination, the supporting-base, the paper-carriage, the printing-frame, the supporting means for the same, consisting of the two parallel arms extending laterally over the carriage and pivotally connected to the base, the said printing-frame being pivoted between the arms and stops on the base for the supporting-arms, and stops on the supporting-arms A for the printing-frame, substantially as described.

4. In combination, the supporting means, the printing-frame comprising the bars 3, pivoted to the support, the type-form plate, the links l, connecting said plate with the side bars 3, and the pad-plate 2, pivoted to the said side bars and extending between them, and the catch for holding the pad-plate in position, substantially as described.

5. In combination with a paper-carriage having a rack-bar, a lever C, a push-pawl 47, pivotcd to the'lever, an arm on the lever, and

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intermediate of its pivot-s adapted to the una removable stop-pin in the push-pawl en gaging with the arm extending' from the lever and limiting the vertical movement of the paWl on its pivots, substantially as described.

G. In combination Wit-h the paper-carriage having a rack-bar toothed on each edge, alever C, withl operating means therefor, a pawl carried by the lever, and a link C,pivoted to the lever at one end and to the base of the inachine at the other end, and having a tooth der edge of the rack, substantially as described.

7. In combination, a stationary roller hav- Witnesses:

JOHN W. PORTER, ANDREW F. REED. 

